Problems

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
0-1 Sequences	6590	992	15%	0.00	1273	649	51%	6.7
10 Kinds of People	11977	2491	21%	0.01	2118	1451	69%	5.1
2048	6608	3119	47%	0.00	2999	2561	85%	2.4
3D Printed Statues	6915	3216	47%	0.00	3025	2709	90%	2.0
3D Printer	577	112	19%	0.00	217	88	41%	8.4
3-Sided Dice	2018	182	9%	0.00	328	124	38%	8.5
4 thought	6515	2207	34%	0.00	2199	1839	84%	2.8
A1 Paper	4310	1285	30%	0.00	1259	1000	79%	3.4
Aaah!	22773	10706	47%	0.00	9571	8913	93%	1.6
Abandoned Animal	1350	278	21%	0.03	337	244	72%	5.2
ABC	9463	4362	46%	0.00	4137	3765	91%	1.7
Ab Initio	398	84	21%	0.10	71	49	69%	7.7
Above Average	5703	2378	42%	0.00	2384	2140	90%	2.0
A+B Problem	6423	642	10%	0.03	911	311	34%	8.2
A Brief Gerrymander	189	41	22%	0.15	43	26	60%	8.5
Abstract Art	233	68	29%	0.00	67	51	76%	5.5
Absurdistan Roads II	528	192	36%	0.00	187	129	69%	6.7
Absurdistan Roads III	1311	361	28%	0.02	348	267	77%	5.5
Access Points	249	100	40%	0.01	90	69	77%	5.9
A Classy Problem	7541	1952	26%	0.01	1678	1299	77%	4.3
ACM Contest Scoring	5438	3444	63%	0.00	3018	2850	94%	1.5
Adding Words	8115	1939	24%	0.00	1882	1447	77%	3.6
A Different List Game	6107	424	7%	0.00	752	154	20%	9.1
A Different Problem	23800	9165	39%	0.00	8407	7310	87%	2.0
Adjoin the Networks	1596	436	27%	0.00	383	302	79%	5.6
Administrative Difficulties	931	214	23%	0.03	232	155	67%	6.4
Advanced Causal Measurements	57	18	32%	0.10	22	18	82%	6.2
Adventure Begins	208	65	31%	0.06	73	55	75%	4.1
Adventures in Moving -- Part IV	781	241	31%	0.00	214	186	87%	4.3
A Favourable Ending	1349	353	26%	0.00	327	246	75%	4.6
A Feast For Cats	1770	614	35%	0.00	408	343	84%	4.3
Air Conditioned Minions	3984	1118	28%	0.00	1164	881	76%	3.5
Airline Hub	1641	298	18%	0.01	323	180	56%	6.8
Airport Coffee	736	164	22%	0.09	153	115	75%	7.0
Airport Construction	2989	397	13%	0.02	318	169	53%	7.6
Airport Logistics	49	12	24%	0.00	18	12	67%	7.4
Airports	353	103	29%	0.11	101	75	74%	5.9
Akcija	5516	2431	44%	0.00	2193	1938	88%	2.0
Aladin	745	71	10%	0.10	116	24	21%	8.9
Alchemy	98	16	16%	0.02	29	16	55%	8.7
Alea iacta est	29	11	38%	0.34	14	11	79%	6.9
Alice in the Digital World	2539	710	28%	0.01	684	539	79%	3.9
Alien Codebreaking	134	7	5%	3.23	20	5	25%	9.0
Alien Numbers	1887	985	52%	0.00	953	868	91%	1.9
A List Game	6664	1977	30%	0.00	1902	1599	84%	2.9
All about that base	2582	1012	39%	0.00	983	823	84%	2.9
All Different Directions	1007	438	43%	0.00	407	354	87%	2.6
Allergy Test	399	120	30%	0.00	126	67	53%	7.5
All Friends	812	156	19%	0.00	143	75	52%	8.9
All Just A Dream	1659	380	23%	0.05	261	182	70%	6.6
All Pairs Shortest Path	7444	1325	18%	0.02	899	633	70%	5.7
Almost Perfect	5783	1357	23%	0.00	1453	1130	78%	3.7
Almost Union-Find	5446	963	18%	0.02	865	497	57%	6.6
Alphabet	1117	550	49%	0.00	553	471	85%	3.0
Alphabet Spam	6178	3964	64%	0.00	3140	3025	96%	1.3
Alternative Bracket Notation	203	84	41%	0.00	90	74	82%	5.4
Altruistic Amphibians	347	82	24%	0.24	84	60	71%	5.4
Amalgamated Artichokes	3429	1532	45%	0.01	1384	1203	87%	2.8
Amanda Lounges	1273	359	28%	0.03	330	260	79%	5.6
A Mazing!	2146	494	23%	0.09	229	176	77%	5.1
Amazing Adventures	156	46	29%	0.03	53	36	68%	5.7
Amazing Race	269	73	27%	0.39	79	58	73%	6.9
Ambiguous Result	215	54	25%	0.02	79	51	65%	7.3
Amsterdam Distance	1150	509	44%	0.00	545	451	83%	2.8
A Multiplication Game	543	170	31%	0.00	195	145	74%	4.7
Anagram Counting	2867	1106	39%	0.00	1063	882	83%	3.1
Andrew the Ant	233	66	28%	0.06	78	58	74%	5.6
A New Alphabet	9097	4136	45%	0.00	3878	3586	92%	1.8
An I for an Eye	389	103	26%	0.00	111	87	78%	4.0
Animal Classification	1515	348	23%	0.03	295	196	66%	6.8
An Industrial Spy	1355	704	52%	0.02	560	481	86%	3.2
Another Brick in the Wall	2615	1270	49%	0.00	1225	1123	92%	1.8
Another Candies	6591	1767	27%	0.00	1861	1522	82%	2.9
Another Dice Game	87	63	72%	0.00	57	52	91%	3.4
Another Query on Array Problem	1267	159	13%	0.05	270	113	42%	7.9
Antenna Placement	32	18	56%	0.00	10	8	80%	6.6
Anthony and Cora	691	181	26%	0.00	216	151	70%	5.5
Anthony and Diablo	2149	738	34%	0.00	780	676	87%	2.4
Antiarithmetic?	1137	214	19%	0.01	271	153	56%	7.2
Ants	2890	1311	45%	0.00	1024	911	89%	2.3
Apaxiaaaaaaaaaaaans!	9977	6100	61%	0.00	5445	5219	96%	1.4
Apostrophe Catastrophe	65	17	26%	0.00	17	11	65%	6.2
Appalling Architecture	386	103	27%	0.00	97	83	86%	3.4
Apparatus	644	164	25%	0.01	128	97	76%	5.3
Apple Market	454	93	20%	0.07	111	58	52%	8.0
Apples, Cherries, and Mangos	376	117	31%	0.02	115	85	74%	6.6
A Prize No One Can Win	951	400	42%	0.00	353	310	88%	2.5
Aquarium Tank	463	126	27%	0.00	122	95	78%	5.3
Aqueduct Construction	162	61	38%	0.01	47	41	87%	5.7
A Question of Ingestion	1128	279	25%	0.00	258	197	76%	5.8
Arable Area	248	62	25%	0.04	62	40	65%	7.3
Arachnophobia	264	79	30%	0.14	74	61	82%	4.7
A Random Problem	170	42	25%	0.00	45	26	58%	7.0
A Rational Sequence	1432	493	34%	0.00	511	372	73%	4.7
A Rational Sequence 2	1854	1364	74%	0.00	1208	1159	96%	1.5
A Rational Sequence (Take 3)	722	603	84%	0.00	485	465	96%	1.8
Arbitrage?	1782	365	20%	0.02	269	217	81%	3.6
Arcade!	1164	210	18%	0.01	202	145	72%	6.0
Arctic Network	1369	489	36%	0.00	434	347	80%	4.6
A Real Challenge	6748	3227	48%	0.00	3128	2925	94%	1.6